HARLEY-DAVIDSON 59920-70 Boat Tail Cowl Fender Guidex Light

( Brand: Harley-davidson ), ( Manufacturer Part Number: 59920-70 ), ( Type: Fender ), ( Machine Type: Street Motorcycle ), ( Color: Red ), ( Items Included: Mounting Hardware, Light Assembly ), ( Material: Fiberglass ), ( Vintage Part: Yes ), ( Finish: Painted ), ( Placement On Vehicle: Rear ), ( Country Of Origin: United States )

Review HARLEY DAVIDSON Oem Boat Tail Cowl Fender Guidex Light fits SPORTSTER BOSS 900 1970–1971

The **Harley-Davidson 59920-70 1970-1971 Sportster Boat-Tail Cowl Fender Guidex Light Boss 900** is a meticulously crafted, high-quality reproduction part designed to restore the classic, aggressive aesthetic and functional integrity of the iconic 1970 and 1971 Harley-Davidson Sportster models. This piece is a faithful replication of the original **Boat-Tail Cowl Fender**, a signature component of the Sportster s distinctive front-end styling, which not only enhanced the bike s visual appeal but also provided practical protection for the engine and front suspension. Crafted from durable, high-grade materials, this fender is built to withstand the rigors of daily riding while maintaining the timeless, rugged charm of the original. The **Guidex Light Boss 900** designation indicates that this part is engineered to fit seamlessly with the **Guidex Light** system, a popular aftermarket upgrade that enhances visibility and safety without compromising the bike s vintage look. The **900** reference suggests compatibility with the **900-series Guidex Light**, ensuring a precise fit and optimal functionality. Whether you're a restorer seeking authenticity or a rider looking to preserve the classic Sportster silhouette, this fender is an essential component that bridges form and function. Its attention to detail from the precise contours of the cowl to the sturdy mounting points ensures that it not only looks like the original but performs as expected, making it a must-have for any enthusiast aiming to revive or maintain the legendary allure of the 1970-1971 Sportster.

### **Pros and Cons of Buying a 1970-1971 Harley-Davidson Sportster (59920-70) with Boat Tail, Cowl, Fender, Guidex Light, and Boss 900**

#### **Pros**

1. **Classic Design and Heritage**

The 1970-1971 Sportster, particularly the **Boat Tail** variant, is one of Harley-Davidson s most iconic models from the era. Its clean, aggressive styling with the distinctive rear fender, cowl, and Guidex light makes it instantly recognizable and highly desirable among vintage enthusiasts. Owning one connects you to Harley s golden age of custom and cruiser motorcycles.

2. **Mechanical Simplicity and Durability**

The **740cc flat-twin engine** (later upgraded to **900cc** in the Boss 307/900 models) is a robust, air-cooled design known for longevity if properly maintained. The **two-up front fork, rigid rear axle, and simple drivetrain** (chain or belt in later models) make it easier to work on compared to modern bikes with complex electronics.

3. **Modification Potential**

The Sportster s **simple frame and engine layout** allow for extensive customization. You can easily swap in modern components (alternator, ignition, suspension, brakes) while keeping the original aesthetic. The **Boss 900** variant, in particular, offers a more powerful engine (900cc) with better performance than the standard 740cc models.

4. **Lower Running Costs (Compared to Modern Bikes)**

Fuel efficiency is decent for a cruiser (around **40-50 mpg**), and parts are widely available, especially for common models like the Sportster. While not as fuel-efficient as a modern bike, the cost of ownership is lower than a high-performance or electric motorcycle.

5. **Community and Show Potential**

The **Boat Tail Sportster** is a **highly collectible** model, especially in good condition. It performs well at **vintage bike shows** and has a strong following among Harley purists. Owning one allows you to participate in **classic bike clubs, rallies, and restoration projects**, which can be rewarding for enthusiasts.

6. **Reliability (If Well-Maintained)**

Many original **1970-1971 Sportsters** still run today with relatively minor updates. The **Boss 900** models, in particular, were designed to be more refined than earlier Sportsters, with better carburetion and smoother power delivery.

---

#### **Cons**

1. **High Maintenance Requirements**

Despite its simplicity, the **740cc/900cc engine** is **notoriously thirsty for oil** and prone to **piston ring wear** if not maintained properly. Many original bikes suffer from **oil leaks, worn bearings, and carburetor issues**. The **Boss 900** is slightly better but still requires **regular valve adjustments, timing belt (if equipped) checks, and carburetor tuning**.

- **Common issues:** Oil consumption, rod bearing wear, carburetor float problems, and electrical gremlins (especially in older models).

2. **Poor Modern Safety Features**

The **rigid rear axle, two-up front fork, and drum brakes** make this bike **less safe by today s standards**. Cornering stability is limited, and stopping power is weak compared to modern disc brakes and suspension systems.

- **No ABS, minimal traction control, and poor visibility** (especially with the cowl and fender) can be concerning for modern riders.

3. **Fuel and Emissions Concerns**

The **carbureted engine** is inefficient and **notoriously hard to start in cold weather**. Modern fuel blends (higher ethanol content) can also cause **carburetor clogging and performance issues**.

- **No catalytic converter or emissions compliance** means it **cannot legally be ridden in many areas** without modifications (e.g., adding a catalytic converter, which can be difficult on these bikes).

4. **Riding Position and Comfort**

The **upright riding position** is comfortable for long rides but can be **tiring on long trips** compared to modern low-slung cruisers. The **hard seat and minimal wind protection** (especially without a windscreen) make it less ideal for highway touring.

5. **Parts and Restoration Costs**

While parts are **widely available**, **high-quality reproduction or aftermarket components** (e.g., modern suspension, brakes, or electrical systems) can be **expensive**. Restoring one to full running condition often requires **significant investment in labor and parts**.

- **Boss 900 models** are slightly more refined but still require **regular maintenance** to keep them running smoothly.

6. **Resale Value and Depreciation**

While **well-preserved examples** hold value, most **1970-1971 Sportsters depreciate quickly** unless they are **fully restored or rare variants**. The **Boat Tail is more desirable**, but even then, it may not retain value as well as newer classics (e.g., 1960s or 1980s Harley-Davidsons).

7. **Legal and Insurance Challenges**

- **Insurance can be difficult and expensive** due to the bike s age, lack of modern safety features, and potential for mechanical failure.

- **Some states require modern safety equipment** (e.g., turn signals, reflectors, or even a catalytic converter), which may require modifications.

- **No helmet laws in some areas** can make riding this bike (with its limited visibility) riskier.

---

### **Conclusion**

The **1970-1971 Harley-Davidson Sportster (Boat Tail, Cowl, Fender, Guidex Light, Boss 900)** is a **fantastic choice for an enthusiast** who values **classic design, mechanical simplicity, and the joy of riding a piece of motorcycle history**. It offers **modification potential, strong community appeal, and a unique riding experience** that modern bikes cannot replicate.

However, it is **not a practical daily rider** for most people today. The **high maintenance costs, poor safety features, fuel inefficiency, and legal challenges** make it more suited for **weekend cruising, restoration projects, or show bikes** rather than daily use.

If you are **passionate about vintage motorcycles, willing to invest time in maintenance, and don t mind its limitations**, this bike is an **excellent investment in nostalgia and craftsmanship**.

If you **prioritize safety, reliability, and modern convenience**, a **restored or modern cruiser** (e.g., a 2000s Harley-Davidson, Indian Chief, or even a well-maintained 1980s Sportster) may be a better choice.

---

### **Recommendation**

- You **love classic Harley-Davidsons** and want a **show-quality or project bike**.

- You are **prepared for high maintenance costs** and enjoy **working on your own bike**.

- You plan to **ride it occasionally** (not daily) and **keep it in a garage** when not in use.

- You are **willing to invest in modern upgrades** (suspension, brakes, electrical system) while preserving the original aesthetic.

- You **enjoy the community** of vintage bike owners and plan to participate in **rallies and restoration groups**.

- You **need a reliable, low-maintenance daily rider**.

- You **don t have mechanical experience** or the time to work on a high-mileage classic.

- You **prioritize safety and modern features** (ABS, disc brakes, better suspension).

- You **live in an area with strict emissions laws** that make it difficult to legally ride.

- You **cannot afford unexpected repair costs** (which can easily exceed $2,000-$5,000 for a full restoration).

This **1970-1971 Sportster is a dream machine for the right owner** someone who appreciates **vintage engineering, customization, and the thrill of riding a true classic**. However, it is **not a practical choice for casual riders or those seeking a hassle-free experience**. If you are **serious about owning one**, **buy the best-condition example you can afford, budget for restoration, and enjoy the journey** both on the road and in the workshop.

Details:

This is a clean survivor assembly with character not over-restored. Shipping costs are estimates. The OEM Guide tail light assembly is factory-correct and intact. The material feels like a tough leather-type cover and complements the era perfectly.

Whats pictured is whats included. Please see my other listings. Note: This is the Sportster XL version and different from FX Super Glide boat tail. Finished in maroon red with Boss 900 script on the sides, this cowl captures unmistakable early 70s Sportster performance look.

The Boss 900 side graphics remain visible and period-correct. More parts available. Styling era, this is a factory-original piece not modern reproduction. Genuine OEM Harley-Davidson fiberglass Boat Tail rear fender cowl assembly originally introduced for the 1970 1971 XLH/XLCH Sportster 900 model's.

I ll gladly combine shipping on multiple orders. Please examine photos for condition and quality. The foam remains resilient, and the cover is in nice shape with some scuffing but no holes. CONDITION Overall very nice original used condition.

The fiberglass structure is solid with excellent integrity and no major cracks. COMPONENTS INCLUDED OEM Fiberglass Boat Tail Cowl Custom Black Diamond-Stitch Seat Guide / Guide-X Light Assembly. Produced during the iconic Willie G. Included is a period-style black diamond-stitch custom seat and an OEM Guide/Guide-X tail light assembly that factory-correct for the application.

Please view photos and inspect as well. The diamond-stitch seat has a strong 1970s custom look. This is the XL-specific version, featuring flatter top profile compared to taller FX Super Glide variant. More coming soon.

specifications febocy:

• for models: 900, Sportster, Boss
• for makes: Harley
• for years: 1970-1971
• brand: Harley-davidson
• mpn: 59920-70
• type: Fender
• machine type: Street Motorcycle
• color: Red
• items included: Mounting Hardware, Light Assembly
• material: Fiberglass
• vintage part: Yes
• finish: Painted
• placement on vehicle: Rear
• country of origin: United States

seller febocy:

• city: Powhatan, Virginia
• # reviews: 3895
• rating: 99.5%

shipping febocy:

• type: Fixed
• transit: 8-14 Days
• class: Standard
• service: USPS Ground Advantage
• carrier: USPS
• cost: $0.00

returns febocy:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller

payments febocy:

• wallet: Google-pay
• other
• credit card: Diners-club

general febocy:

• condition: Used
• Motorcycle Scooter Parts Accessories > Body Frame > Fenders

offer febocy:

• availability: In Stock
• sold: 0
• options: Ship-to-home
• quantity: 1
• best offers: True
• started: February 11, 2026

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